The standard mesh FRP grating, with its familiar 38 x 38 mm (1.5 x 1.5 inch) square opening, is the grid pattern most people picture when they think of molded fiberglass grating. It balances a high open area of about 70% with good structural integrity, giving excellent drainage, light penetration and self-cleaning behaviour while still supporting foot traffic and light trolleys. Manufactured by Nantong Zeall New Materials Co., Ltd. (ZeAllgrate) since 2004, ISO 9001 certified and exported to more than 45 countries, the standard mesh panel is the default grid for general industrial walkways, platforms, stair treads and trench covers.
The dominance of the 38 x 38 mm pattern also means it is the best-documented and most competitively stocked size: local distributors often hold panels in green and grey, and replacement parts can be sourced quickly if a panel is damaged years after installation. The high open area lets natural light reach equipment below, reducing the need for artificial lighting on lower levels, and it gives operators a clear view of plant and pipework beneath the walkway for safety inspections. These small operational benefits add up over a multi-decade service life.
The 38 x 38 mm opening is the industry standard and the most economical pattern for general use.
| Parameter | Value |
|---|---|
| Opening size | 38 x 38 mm (1.5 x 1.5 in) |
| Open area | approx. 70-75% |
| Typical thicknesses | 25 / 38 / 40 / 50 mm molded |
| Standard panel size | 1220 x 3660 mm |
| Resin options | Polyester (standard); vinyl ester for severe corrosion |
| Surface finish | Grit top or smooth |
| Drainage / self-cleaning | Excellent - rain, oils and debris pass through |
Standard mesh is the workhorse pattern for nearly every industrial and commercial walkway application. Typical uses include general process-plant walkways and operating platforms, mezzanine floors, stair treads and landings, pipe-rack walkways, fire escape and external stair gratings, drainage and trench covers, parking deck and wash-down areas, offshore and marine walkways, water and wastewater treatment works, pulp-and-paper and power-plant floor grids, and architectural balcony and terrace paving. The high open area means rain and wash water fall through rather than ponding, loose debris does not collect on the surface, and sunlight reaches levels below - all of which reduce cleaning and slip risk. Because it is the most common pattern, clips, cutting tools and installation details are well established.
Start with standard mesh for almost any general walkway: it is the most open, most economical and best-draining pattern. Move to mini-mesh only when small tools, bolts, heels or food pieces must not fall through the openings. Choose thickness by load, not by mesh: 25/38 mm for pedestrians, 40mm for pallet jacks, 50mm for forklifts. Choose resin by chemistry: polyester for general duty, vinyl ester for acids and solvents.
ZeAllgrate standard mesh grating is manufactured under ISO 9001. Flame spread meets ASTM E84 and molded construction follows ASTM D3743. Opening consistency and grit coverage are checked on each batch before shipment.
Support on steel or FRP stringers and fix with stainless C- or L-clips at every bearing bar. Cut with a fine-tooth saw, deburr and seal edges with resin. The 38 mm opening aligns well with standard clip centres.
Q: What does 1.5 inch mesh mean?
A: It refers to the 38 x 38 mm clear opening between bars, the most common molded grating pattern worldwide.
Q: Does standard mesh drain well?
A: Yes, roughly 70-75% open area lets rain, oils and wash water pass straight through without ponding.
Q: Can small objects fall through?
A: Yes, bolts and small tools can fall through 38 mm openings; use mini-mesh where that is a concern.
Q: Is it self-cleaning?
A: The open grid sheds debris and is washed clean by rain and hose-down, which is why it is preferred in wet industrial areas.
Compare mesh: mini-mesh for small falls prevention. Choose thickness: 25mm, 38mm, 40mm, 50mm. See the molded FRP grating product page and applications in construction and chemical plants.